Trying to change the Release/Debug connection string (ORACLE) of a VS13 Lightswitch project. Getting ORA-00942 error...

Hello,
i try to change the connection string of a Lightswitch 2013 project. I have a database for developers and a 'productive' database for releases. Both are similar (table names, entries etc..) and they are from ORACLE. First i attached the developer database
as an external source. Everything works fine. Now I'm trying to change the connection string  whether my application is in a release state or in a developer state.
I found a hint in the following question to solve that issue: Question
from a LS-User 
It is possible to change the connection string during the runtime. I tried it out and added to my DataBaseService.lsml.cs:
partial void DataBase_InitializingConnection(DatabaseConnectionState state)
state.ConnectionString = "DATA SOURCE=DB.productive;PASSWORD=password;PERSIST SECURITY INFO=True;USER ID=USER_PROD";
Well, Lightswitch is using the new connection. But when i run the application, i am getting the error "ORA-00942: table or view does not exist". The views and tables definitely exist. The two schemas are the same. So what am i doing wrong?
Regards from Munich

HI Munich,
Welcome to Lightswitch forum.
According to your description above, you want to connect to external datasource in Lightswitch application.
Oracle is not a supported data source for LightSwitch, it's recommended to use SQL Server database.
If you want to change the connection string, you can update the connection string for a data source using the data source wizard. For example in VS2013: 
Please let me know if there is anything that I can do to help.
Best regards,
Angie
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